轴舵系拉线照光程序Procedure for the lighting and sighting of the rudder line and the shaftline1、 在船坞底船体中心线上，-3#肋位与艉轴管后端面所在肋位之间某处放一激光仪（此激光仪只能在同一重垂面内转动），然后分别用激光打-3#肋位及艉轴管后端面两处的钢丝心，确定这两点在船中心面的内，及已确定了整根轴线在同一中心面上。On the ship center line of the dock, a laser equipment (this laserequipment only can turn in same vertical face)is put on someplacebetween the Fr –3# and the Fr 7.5#. Then respectively lase targetcenter of the Fr –3# and the Fr 7.5# , in order to make sure thatthese two points all are in the ship center face ,so it is also certainthat the whole shaft line is in the ship center face.2、 记录基线至轴线（-3#肋位）的距离（理论值为 4477±7mm）.Record the distance between the base line and shaft line at the Fr –3# ( design is 4477±7mm)3、 在机舱内 27#肋位中心点上放一激光仪（只可在同一水平面内转动），用激光分别打-3#肋位及 39#肋位处的靶杆，确定 39#肋位处的靶心与-3#肋位处的靶心同处一水平面上。In E/R, a laser equipment( this laser equipment only can turn insame horizontal face ) is put on center point of the Fr 27# ,respectively lase target poles of the Fr –3# and the Fr 39#, andrespectively measure the distance between laser point which is thetarget pole and the target center . If two distances is same ,it meansthat two target center points is same level , and it means shaft lineis in one horizontal face. 4、 在船坞底中心线上放一激光仪（此激光仪只能在同一重垂面内转动），用激光确定船坞底零号肋位所在点在中心线上，再确定舵线与轴线之间的距离，垂直度误差。On the ship center line of the dock, a laser equipment (this laserequipment only can turn in same vertical face) is put on .Respectively lase and make sure that point Fr 0# is on the center line , then make sure that intersect distance ≤5mm , verticality≤1mm/m 。5、 记录舵线至艉轴管后端面的距离（理论值为 6000mm）Record the distance from rudder line to end face of the stern tube(design is 6000 mm ) .6、 记录舵系定位检查记录上 H6、H7、H8、H9、H10 的值，及上舵销孔，下舵销孔的镗孔余量。Record the dimensions of H6、H7、H8、H9、H10 ，and boringdimensions of the upper pintle hole and lower pintle hole.7、 记录艉管长度（理论值为 5400mm）、后舱壁至艉管前端面距离（理论值为 172mm）。Record the length of the stern tube( design is 5400mm) and thelength between the aft bulkhead of E/R and the fore end of thestern tube ( design is 172mm) .8、 记录中间轴承座高度（理论值为 580mm）。Record the height of the intermedial shaft bearing seat ( design is580mm).9、 记录主机机座高度（理论值为 1570mm）。Record the height of the M/E seat (design is 1570mm).10、 用在钢丝线上挂线锤的方法，记录 27#、33#、37#三档肋位处轴线对主机机座的分中数据。Hang the plumb on the shaft piano wire to measure the twodistances which are between center line and the two edges of theM/E seat of the Fr 27#, Fr 33# and Fr37# respectively.11、 在艉轴管前后分别用激光粗打镗孔余量的分布情况。Respectively lase both sides of the stern tube in order to measurethe boring dimensions roughly.12、 初定主机末端第一颗地脚螺孔位置，初定中间轴承位置。Ascertain the first bolt of the M/E aft end and the position of theintermedial shaft bearing. 13、 照光确认轴系 B、C、D、E、F 点的中心及舵系镗孔圆中心。Through sighting ascertain the center of the point B、C、D、E、F onthe shaft line and the center of rudder line one by one.14、 通过内径分厘卡的测量，将 A、C 两个点上的基准功能分别转往各个对应的工艺基准螺钉上去，使他们成为镗杆校中的依据。By inner diameter micrometer, add technical screw to the both endsof the stern tube at point A、C in order to make them the base ofboring rod alignment.15、 划轴、舵系镗孔加工圆，检验圆。Draw the machining circle and the inspection circle .